phy: rename struct omap_control_usb to struct omap_control_phy

Rename struct omap_control_usb to struct omap_control_phy since it can
be used to control PHY of USB, SATA and PCIE. Also move the driver and
include files under *phy* and made the corresponding changes in the users
of phy-omap-control.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>

1 files changed, 320 insertions, 0 deletions

diff --git a/drivers/phy/phy-omap-control.c b/drivers/phy/phy-omap-control.c
new file mode 100644
index 000000000000..17fc200210c8
--- /dev/null
+++ b/drivers/phy/phy-omap-control.c
@@ -0,0 +1,320 @@
+/*
+ * omap-control-phy.c - The PHY part of control module.
+ *
+ * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Author: Kishon Vijay Abraham I <kishon@ti.com>
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/phy/omap_control_phy.h>
+
+/**
+ * omap_control_phy_power - power on/off the phy using control module reg
+ * @dev: the control module device
+ * @on: 0 or 1, based on powering on or off the PHY
+ */
+void omap_control_phy_power(struct device *dev, int on)
+{
+        u32 val;
+        unsigned long rate;
+        struct omap_control_phy *control_phy;
+
+        if (IS_ERR(dev) || !dev) {
+                pr_err("%s: invalid device\n", __func__);
+                return;
+        }
+
+        control_phy = dev_get_drvdata(dev);
+        if (!control_phy) {
+                dev_err(dev, "%s: invalid control phy device\n", __func__);
+                return;
+        }
+
+        if (control_phy->type == OMAP_CTRL_TYPE_OTGHS)
+                return;
+
+        val = readl(control_phy->power);
+
+        switch (control_phy->type) {
+        case OMAP_CTRL_TYPE_USB2:
+                if (on)
+                        val &= ~OMAP_CTRL_DEV_PHY_PD;
+                else
+                        val |= OMAP_CTRL_DEV_PHY_PD;
+                break;
+
+        case OMAP_CTRL_TYPE_PIPE3:
+                rate = clk_get_rate(control_phy->sys_clk);
+                rate = rate/1000000;
+
+                if (on) {
+                        val &= ~(OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK |
+                                OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_MASK);
+                        val |= OMAP_CTRL_PIPE3_PHY_TX_RX_POWERON <<
+                                OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT;
+                        val |= rate <<
+                                OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT;
+                } else {
+                        val &= ~OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK;
+                        val |= OMAP_CTRL_PIPE3_PHY_TX_RX_POWEROFF <<
+                                OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT;
+                }
+                break;
+
+        case OMAP_CTRL_TYPE_DRA7USB2:
+                if (on)
+                        val &= ~OMAP_CTRL_USB2_PHY_PD;
+                else
+                        val |= OMAP_CTRL_USB2_PHY_PD;
+                break;
+
+        case OMAP_CTRL_TYPE_AM437USB2:
+                if (on) {
+                        val &= ~(AM437X_CTRL_USB2_PHY_PD |
+                                        AM437X_CTRL_USB2_OTG_PD);
+                        val |= (AM437X_CTRL_USB2_OTGVDET_EN |
+                                        AM437X_CTRL_USB2_OTGSESSEND_EN);
+                } else {
+                        val &= ~(AM437X_CTRL_USB2_OTGVDET_EN |
+                                        AM437X_CTRL_USB2_OTGSESSEND_EN);
+                        val |= (AM437X_CTRL_USB2_PHY_PD |
+                                         AM437X_CTRL_USB2_OTG_PD);
+                }
+                break;
+        default:
+                dev_err(dev, "%s: type %d not recognized\n",
+                        __func__, control_phy->type);
+                break;
+        }
+
+        writel(val, control_phy->power);
+}
+EXPORT_SYMBOL_GPL(omap_control_phy_power);
+
+/**
+ * omap_control_usb_host_mode - set AVALID, VBUSVALID and ID pin in grounded
+ * @ctrl_phy: struct omap_control_phy *
+ *
+ * Writes to the mailbox register to notify the usb core that a usb
+ * device has been connected.
+ */
+static void omap_control_usb_host_mode(struct omap_control_phy *ctrl_phy)
+{
+        u32 val;
+
+        val = readl(ctrl_phy->otghs_control);
+        val &= ~(OMAP_CTRL_DEV_IDDIG | OMAP_CTRL_DEV_SESSEND);
+        val |= OMAP_CTRL_DEV_AVALID | OMAP_CTRL_DEV_VBUSVALID;
+        writel(val, ctrl_phy->otghs_control);
+}
+
+/**
+ * omap_control_usb_device_mode - set AVALID, VBUSVALID and ID pin in high
+ * impedance
+ * @ctrl_phy: struct omap_control_phy *
+ *
+ * Writes to the mailbox register to notify the usb core that it has been
+ * connected to a usb host.
+ */
+static void omap_control_usb_device_mode(struct omap_control_phy *ctrl_phy)
+{
+        u32 val;
+
+        val = readl(ctrl_phy->otghs_control);
+        val &= ~OMAP_CTRL_DEV_SESSEND;
+        val |= OMAP_CTRL_DEV_IDDIG | OMAP_CTRL_DEV_AVALID |
+                OMAP_CTRL_DEV_VBUSVALID;
+        writel(val, ctrl_phy->otghs_control);
+}
+
+/**
+ * omap_control_usb_set_sessionend - Enable SESSIONEND and IDIG to high
+ * impedance
+ * @ctrl_phy: struct omap_control_phy *
+ *
+ * Writes to the mailbox register to notify the usb core it's now in
+ * disconnected state.
+ */
+static void omap_control_usb_set_sessionend(struct omap_control_phy *ctrl_phy)
+{
+        u32 val;
+
+        val = readl(ctrl_phy->otghs_control);
+        val &= ~(OMAP_CTRL_DEV_AVALID | OMAP_CTRL_DEV_VBUSVALID);
+        val |= OMAP_CTRL_DEV_IDDIG | OMAP_CTRL_DEV_SESSEND;
+        writel(val, ctrl_phy->otghs_control);
+}
+
+/**
+ * omap_control_usb_set_mode - Calls to functions to set USB in one of host mode
+ * or device mode or to denote disconnected state
+ * @dev: the control module device
+ * @mode: The mode to which usb should be configured
+ *
+ * This is an API to write to the mailbox register to notify the usb core that
+ * a usb device has been connected.
+ */
+void omap_control_usb_set_mode(struct device *dev,
+        enum omap_control_usb_mode mode)
+{
+        struct omap_control_phy *ctrl_phy;
+
+        if (IS_ERR(dev) || !dev)
+                return;
+
+        ctrl_phy = dev_get_drvdata(dev);
+
+        if (!ctrl_phy) {
+                dev_err(dev, "Invalid control phy device\n");
+                return;
+        }
+
+        if (ctrl_phy->type != OMAP_CTRL_TYPE_OTGHS)
+                return;
+
+        switch (mode) {
+        case USB_MODE_HOST:
+                omap_control_usb_host_mode(ctrl_phy);
+                break;
+        case USB_MODE_DEVICE:
+                omap_control_usb_device_mode(ctrl_phy);
+                break;
+        case USB_MODE_DISCONNECT:
+                omap_control_usb_set_sessionend(ctrl_phy);
+                break;
+        default:
+                dev_vdbg(dev, "invalid omap control usb mode\n");
+        }
+}
+EXPORT_SYMBOL_GPL(omap_control_usb_set_mode);
+
+#ifdef CONFIG_OF
+
+static const enum omap_control_phy_type otghs_data = OMAP_CTRL_TYPE_OTGHS;
+static const enum omap_control_phy_type usb2_data = OMAP_CTRL_TYPE_USB2;
+static const enum omap_control_phy_type pipe3_data = OMAP_CTRL_TYPE_PIPE3;
+static const enum omap_control_phy_type dra7usb2_data = OMAP_CTRL_TYPE_DRA7USB2;
+static const enum omap_control_phy_type am437usb2_data = OMAP_CTRL_TYPE_AM437USB2;
+
+static const struct of_device_id omap_control_phy_id_table[] = {
+        {
+                .compatible = "ti,control-phy-otghs",
+                .data = &otghs_data,
+        },
+        {
+                .compatible = "ti,control-phy-usb2",
+                .data = &usb2_data,
+        },
+        {
+                .compatible = "ti,control-phy-pipe3",
+                .data = &pipe3_data,
+        },
+        {
+                .compatible = "ti,control-phy-dra7usb2",
+                .data = &dra7usb2_data,
+        },
+        {
+                .compatible = "ti,control-phy-am437usb2",
+                .data = &am437usb2_data,
+        },
+        {},
+};
+MODULE_DEVICE_TABLE(of, omap_control_phy_id_table);
+#endif
+
+
+static int omap_control_phy_probe(struct platform_device *pdev)
+{
+        struct resource *res;
+        const struct of_device_id *of_id;
+        struct omap_control_phy *control_phy;
+
+        of_id = of_match_device(of_match_ptr(omap_control_phy_id_table),
+                                &pdev->dev);
+        if (!of_id)
+                return -EINVAL;
+
+        control_phy = devm_kzalloc(&pdev->dev, sizeof(*control_phy),
+                GFP_KERNEL);
+        if (!control_phy) {
+                dev_err(&pdev->dev, "unable to alloc memory for control phy\n");
+                return -ENOMEM;
+        }
+
+        control_phy->dev = &pdev->dev;
+        control_phy->type = *(enum omap_control_phy_type *)of_id->data;
+
+        if (control_phy->type == OMAP_CTRL_TYPE_OTGHS) {
+                res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+                        "otghs_control");
+                control_phy->otghs_control = devm_ioremap_resource(
+                        &pdev->dev, res);
+                if (IS_ERR(control_phy->otghs_control))
+                        return PTR_ERR(control_phy->otghs_control);
+        } else {
+                res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+                                "power");
+                control_phy->power = devm_ioremap_resource(&pdev->dev, res);
+                if (IS_ERR(control_phy->power)) {
+                        dev_err(&pdev->dev, "Couldn't get power register\n");
+                        return PTR_ERR(control_phy->power);
+                }
+        }
+
+        if (control_phy->type == OMAP_CTRL_TYPE_PIPE3) {
+                control_phy->sys_clk = devm_clk_get(control_phy->dev,
+                        "sys_clkin");
+                if (IS_ERR(control_phy->sys_clk)) {
+                        pr_err("%s: unable to get sys_clkin\n", __func__);
+                        return -EINVAL;
+                }
+        }
+
+        dev_set_drvdata(control_phy->dev, control_phy);
+
+        return 0;
+}
+
+static struct platform_driver omap_control_phy_driver = {
+        .probe          = omap_control_phy_probe,
+        .driver         = {
+                .name   = "omap-control-phy",
+                .owner  = THIS_MODULE,
+                .of_match_table = of_match_ptr(omap_control_phy_id_table),
+        },
+};
+
+static int __init omap_control_phy_init(void)
+{
+        return platform_driver_register(&omap_control_phy_driver);
+}
+subsys_initcall(omap_control_phy_init);
+
+static void __exit omap_control_phy_exit(void)
+{
+        platform_driver_unregister(&omap_control_phy_driver);
+}
+module_exit(omap_control_phy_exit);
+
+MODULE_ALIAS("platform: omap_control_phy");
+MODULE_AUTHOR("Texas Instruments Inc.");
+MODULE_DESCRIPTION("OMAP Control Module PHY Driver");
+MODULE_LICENSE("GPL v2");